Title :
FPGA-based radix-4 butterflies for HIPERLAN/2
Author :
Pérez-Pascual, A. ; Sansaloni, T. ; Valls, J.
Author_Institution :
Dpto Ingenieria Electronica, Univ. Politecnica de Valencia, Spain
Abstract :
This paper presents two different FPGA-implementation of radix-4 butterflies suitable for HIPERLAN 2. The two approaches lead to an efficient use of the hardware resources available in the target device and reduces the area with respect to the direct implementation of the radix-4 butterfly. Both methods reduce the area required storing the coefficients. The first one uses the symmetries of coefficients for reducing the number of functions to store; the second one takes advantage of the dual-port capability of the embedded block-RAM.
Keywords :
distributed arithmetic; fast Fourier transforms; field programmable gate arrays; radio access networks; wireless LAN; 64 points FFT; FPGA implementation; HIPERLAN 2; broadband radio access LAN; coefficients storage area reduction; dual-port capability; embedded block-RAM; local area network; radix-4 butterflies; symmetries of coefficients; Arithmetic; Digital modulation; Equations; Field programmable gate arrays; Frequency conversion; Frequency modulation; Hardware; Local area networks; OFDM modulation; Topology;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010214
